Home / 13,221.84-18,239.40-10,072.56

Finding the Fourth Proportional to 13,221.84, 18,239.40 and 10,072.56

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Solution

The fourth proportional to 13,221.84, 18,239.40 and 10,072.56 is: 13,895.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.84 : 18,239.40 = 10,072.56 : x
  2. Step 2: Convert to fraction form
    13,221.84/18,239.40 = 10,072.56/x
  3. Step 3: Cross multiply
    13,221.84x = 18,239.40 × 10,072.56
  4. Step 4: Simplify right side
    13,221.84x = 183,717,450.86
  5. Step 5: Solve for x
    x = 183,717,450.86/13,221.84
  6. Step 6: Final answer
    x = 13,895.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.